تقرير
k-nets embedded in a projective plane over a field
| العنوان: | k-nets embedded in a projective plane over a field |
|---|---|
| المؤلفون: | Korchmaros, G., Nagy, G. P., Pace, N. |
| سنة النشر: | 2013 |
| المجموعة: | Mathematics |
| مصطلحات موضوعية: | Mathematics - Algebraic Geometry |
| الوصف: | We investigate $k$-nets with $k\geq 4$ embedded in the projective plane $PG(2,\mathbb{K})$ defined over a field $\mathbb{K}$; they are line configurations in $PG(2,\mathbb{K})$ consisting of $k$ pairwise disjoint line-sets, called components, such that any two lines from distinct families are concurrent with exactly one line from each component. The size of each component of a $k$-net is the same, the order of the $k$-net. If $\mathbb{K}$ has zero characteristic, no embedded $k$-net for $k\geq 5$ exists; see [1,2]. Here we prove that this holds true in positive characteristic $p$ as long as $p$ is sufficiently large compared with the order of the $k$-net. Our approach, different from that used in [1,2], also provides a new proof in characteristic zero. [1] J. Stipins, Old and new examples of k-nets in P2, math.AG/0701046. [2] S. Yuzvinsky, A new bound on the number of special fibers in a pencil of curves, Proc. Amer. Math. Soc. 137 (2009), 1641-1648. Comment: 13 pages |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1306.5779 |
| رقم الأكسشن: | edsarx.1306.5779 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |